Definition of Sass

Noun: sass sas
Usage: N. Amer

An impudent or insolent rejoinder
"don't give me any of your sass";
- sassing [N. Amer], backtalk [N. Amer], back talk [N. Amer], lip, mouth, backchat [Brit]

Verb: sass sas
Usage: N. Amer

Answer back in an impudent or insolent manner
"don't sass me!"; "The teacher punished the students who were sassing all morning"